Welcome, Robb - you're taking the same route I took of Dune Buggy to Speedster - mine were 30 years apart, tho!
Hang in there with the flooding - shouldn't you be building a boat????? And Cornwall, down there in the Southwest, must be in the thick of it! Pretty country down there, though.....
Not completely familiar with the Pilgrim body - is that the one with a slightly bigger rear seat?
Many of the Speedsters on this side of the pond (CMC/Fiberfab/Street Beast/Vintage Speedsters) have the same body dimensions so we get a Hartz Stay Fast Fabric top from Vintage Speedsters (around $500 USD). Don't think that would fit if your body is slightly longer. If you need them, it shouldn't be a big deal to send along some measurements from our cars over here for you to compare - just ask.
We also use the CMC build manual that is on this site under the Resource tab up above, but you must be a "contributing member" to get to it. It's an OK manual, and we can help with filling in the background info.
Looking forward to seeing your build!
Gordon
The Speedstah Guy from Grafton (Massachusetts)