This is going back a while, but the 1350 is a standard driveshaft flange from Dana/Spicer, had one on my 1977 3/4 ton LS7 powered 4X4 driveshaft. Should be available brand new, it will use standard joints and can be adapted every which way from there, the 1350 is the model of flange used on that PTO (I think).
Once again, been known to fling some serious BS, just what I remember.....