I skate in SP Teri skates. I have also tried Harlicks.
I absolutely ADORE my SP Teri skates and will never ever switch to anything else ever again. I have a wide toe box/front of my foot and an incredibly narrow heel and ankle area. I have also been through two pairs of KT-2 boots and my new ones are custom, which are supposed to be "somewhere in between a KT-2 and a KT-3."
You didn't mention what level you skate at and what kind of stiffness you need in order to complete your elements. I work on all doubles except axel and my last pair of KT-2s held up for about 18 months of pounding (but I skate on average anywhere from 12-15 hours a week in them, the majority of the time is spent jumping).
I had a problem with Harlicks in that as soon as I got them they felt flimsy, especially on my landing leg. I have no idea what made this happen, I didn't try to take them back and have it sorted out at the shop, I just went back to SP Teri. So this is certainly nothing against the people at Harlick or their products. They just didn't work out for me. I know other people that swear by their Harlicks and would never go anywhere else.
But I would point out that if you have been off the ice for 10 years there is a good chance that just through daily life the shape of your foot probably changed, and I would think that no matter what skates you previously had, they wouldn't fit right after that amount of time.
As to whether a stock or custom boot is the way to go, everyone is different. It is going to depend on many factors, too many to list here.
If you leave a message at SP Teri they will eventually get back to you. I'm not sure when you last tried calling them, but I do know that George has been very busy lately traveling to different competitions and such.
You have to find what works for you. Almost anyone that has tried several manufactures is going to have either a success story or a horror story about any particular brand/model you can list. Sadly, it is trial and error. Though I would be inclined to suggest that if you had Harlicks in the past, and didn't have any complaints with the way they fit back then, you may want to just get a new boot from them. But I tried them and hated them. It is definitely an individual preference.
But in ten years...the shape of your foot is definitely going to have changed. And I find that a lot of boot fit has to do with weight too. Not only the obvious of "oh well now I'm 10-20 pounds heavier/lighter," but I find that the fit of my boot slightly changes with even tiny fluctuations of a pound or two.
Good luck with the skate decision! But if I were you, I wouldn't put too much stock in individual people's preferences for one company or another. Any company can make a skate that fits your stiffness needs, and any of the companies will also customize the skates to have them fit your foot. It just depends on what works for you.