>Although the desktop versions are free, they all seem to require the purchase of a developer version for incorporating into Foxpro...i.e. programmatically creating docs from foxpro reports without the user having to name the file etc. Or am I looking at the wrong product?

You should have look at XFRX.
VFP2PDF option is greatly supported by that product.

Or you can purchase just PDFL library (was arround 120$)
if all you want is PDF. But since XFRX introduced XFF scripts, then IMO full version is way better value4money.

But this will not output other windows formats to PDF, you can use PrimoPdf for that.

hth