Looking great Ant!
I was going to go down this road myself a couple of years back but found a restorable factory top cheap. I did make my own bows, which two years later are still serviceable and cosmetically/functionally no different to the originals from the factory
I was making my soft top pattern/prototype out of a cheap plastic-backed canvas painter's dropsheet and found that the top panel was the trickiest to put together without a pattern. Looks like you've conquered the top panel, so the rest of the job should be pretty straightforward. Just two side panels and a rear panel along with a way to secure them rolled up or even make them zip off.
Unfortunately the price and availability of repro/OEM soft tops is very limited, so making your own is a good option. At the end of the day, it's not a difficult job, but it has to be planned well due to the size of the panels. The skills you learn can then be transferred to upholstery and accessory bags/covers for the vehicle. Everybody wins.
A word on sewing machines... an industrial walking foot machine is the ideal, but not necessary. What is necessary is that the machine has enough grunt to do the job - that means steel gearing inside, not plastic. Your wife/gf/whatever will get pissed at you when you strip the gears on her new computerised $800 monstrosity, so go back to basics and grab a well maintained and serviceable vintage machine off
ebay. I used a 1950s vintage Singer 99K - a smallish model with which I have sewn through 12 layers of marine vinyl from my old Kayline top. It will also punch through the clear vinyl windows effectively, but you have to take it slow. My machine cost me $50 plus about $10 for a bunch of #22 needles and another $5 for a massive spool of military surplus canvas thread.
I may revisit this topic myself and make a safari top in lieu of the (homemade) bikini top I run in summer.