From some non specific conversations with MOP supplies over the past few years the inference that i sort of got is they're very much geared to the trade so their material may on occassions be slightly more in the rough than say the nice little squares that you'd get from Stew Macs or allparts et all - i can't comment on Andy DePaule but perhaps it's a bit more 'retail' orientated. On a note i've brought 20-30 ozs from MOP Supplies over the past 3-4 years and never a problem just as long as you tell them if, for example, you want large MOP for truss rod covers, they'll always, in my experience, accomodate.
Jem
Oh, Perry does have a point.