Another after-market builder has gotten out of the business:
Walker's entire shop is for sale, the building, the lot it's on, and all of the fab tooling left inside; all together or separately.
(20836 S. Main Street, Carson CA 90745)
I have no association with the shop, but I have two bros who had Ed balance and blueprint their pan lower/shovel upper motors, and were quite happy with the results.

If anybody is interested - and I am not associated with the sale or advertising thereof - there's a virtual tour at and sales are being handled by The Cotner Crew dba Keller/Williams Realty; contact Pilar Crew at 310-213-8464 if interested.