projector lens

[Erik L]

so i have a Rollei P37 slide projector. it has a ISCO ROLLEI VARIO 70-120 lens. the lens must have been dropped at one point as its never been too sharp and i took it apart and there was a broken retaining clip.

i put it together and its sharper than ever but i dont trust it, nor do i need a zoom. is there any other lens that fits this machine?