Jim Zimmerman has the following new reproduction cylinder liners, plus pistons, plus rings, available (sold as a kit, all three parts per hole):

Sizes:

3 and 3/4 inch bore fits early D2
4 inch bore fits later D2
4 and 1/4 inch bore for the early D4, D6
4 and 1/2 inch bore for the late D4, D6
5 and 3/4 inch bore for the early D7, D8, and 3-cylinder D6 (2H series)

Also, starting engine pistons for D2 and D4, .020, .040, and .060 oversized; $80 each including rings.

Price for early D2 liner, piston, and rings, is $200 per hole.

Call for other prices.

(641) 982-4207 (voice)
(641) 982-4297 (FAX)

Jim does not have a computer and is not on-line to answer questions.

Hi GWH,
Thanks for the info.
Can you inquire and post what engine bearings are available for the same models?

OM, yes I will inquire. I've suggested to Jim that he develop a "catalog" of repro parts he has for sale, and I'd post it here on the bb. GWH

Soumalinen, liners for the 4400 are still available thru Regal Corp, for $24 each, new. go to regalcorp.com, and call the nearest office to you.

I would say it looks like you have things in control. Even at $200 a hole, that is hard to beat.
Mike