Last year I bought a u-bolt style yoke from a vendor on here and after a couple shipping fiascos (and it turns out they shipped me a 14 bolt 1410 yoke instead of a D60 1410 yoke) I bought a strap style yoke from a place local to me so I could make it to BB '07.
The D60 strap style yoke looks VERY easy to modify for u-bolts, probably just drill out the threads and grind a small flat on the back of the yoke for the nut to sit. I haven't done it yet but I have checked it out and it looks easy. IIRC that (Spicer) yoke only cost about $35.