Scott, contact Precision Drive LTD 6201 SW 15th (MacArthur) @ 495-1344. They may be able to find a u-joint to adapt for you. If worse comes to worse they can swap yokes for you. Take them your shaft and the yoke off the 3rd member. Very positive experience with them in the past. Reasonable pricing.

Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)