Dynajet is still doing pumps. I talked to someone not too long ago, he's too busy to answer calls and emails but he's doing everything he can to keep the process going. Just send your manifold(s) with a piece of paper that include a return address and phone number and they'll call you for a
credit card # when it's done. I've had them redo probably 50 manifolds over the years and never had an issue.
Vilco doesn't permanently resleeve the valve seats, they machine it and put in an insert that adds an o-ring under it where it can still wash out again.
Someone told me he sent a head to IDS and they only redid the high pressure seal area even though it needed the valve areas done too, and it still cost more than Dynajet.
