I've made home made 'Diafine' before, worked very well. I'll try to recall the recipe I used. Qutie cheap to mix up, first bath pH is fairly critical as there needs to be -some- development in there so that bath B can accelerate that faint low contrast image, if bath B only has the latent image to work with, you'll get poor thin negs.

Nowadays, I just cant stop loving Xtol (even if it wasn't one of the cheapest, I'd still be all over it).