A M1038 without a winch is essentially a M998. There was no winch on the 1038 when we started restoring it.
Jess Jaynes, owner of High Angle Driveshaft (formerly in Paradise, now in Chico) supplied us with a M1038A2 winch, which installed easily.
Unlike the M1038 and the A1 variant, this winch mounts on the frame and does not use frame extensions (as are visible in earlier pictures of the chassis). A main benefit is that the approach angle is not as reduced as with the extended frame, leaving the approach angle very close to that of the M998.