Perhaps you still want full custom boots? I looked into this a little for myself.
Some of Klingbeils boot makers moved to Avanta, which makes full custom boots. But as I mentioned in
https://www.goldenskate.com/forum/t...jackson-boots-or-risport.100071/#post-3377743
Avanta recently cited 1/2 year time delays and $2250 for full custom boots. (For an extra fee, they do a rush job. I don't know the details)
Avanta says you can fit yourself. They send you a "sock mold" kit, that you mold around your foot. BTW, If you contact them, one of their boot makers will speak to you.
As mentioned in that link, Harlick also offers full custom boots. They cited me $1895 and, depending on who you ask, 18-24 month time delay.
Several brands (e.g., Jackson, and I'm told Riedell) also claim to make "full" custom boots, but customization options seem more limited.
Depending on the condition of your Klingbeils, Avanta might be willing to rebuild them. Maybe they rebuild if the breakdown is largely internal, but the stitching is intact. When I asked about rebuilding my Klingbeils, they said they would guess about rebuilding if I sent them detailed pictures, inside and out. I think Harlick might be willing to rebuild Klingbeils too.
For better or worse, several boot makers (e.g., Jackson) offer, with lower delays and prices, "rapid custom boots". AFAICT, that mostly just means heat molding and internal padding instead of more or less creating custom lasts (molds around which the boots are built) for your feet, though some also offer narrow, medium or wide overall boot widths. In other words, essentially what people use to call good quality "stock" boots. Many boot makers are also willing to do a split fit, in which the left and right foot get different boot sizes. It is possible (maybe even likely) that after you get them heat molded, you will want to modify or recreate the insoles, and have the tight spots punched out (stretched), and add tape to get rid of loose spots.
You may have noticed the current custom boot options are more expensive than Klingbeil used to be. A long time ago Klingbeil charged me about $650. They were very well made, and extremely durable. I wish I had had the foresight to get new factory fit Klingbeils a few months before they closed. Since I'm not a high level skater, I could probably still be using them. Perhaps new Avantas are comparable...
Some Chinese boot makers claim to offer custom boots, much cheaper. But, AFAICT, you need to know Chinese to order from them, and I don't know anything about them.