I'd love to do it if the volumes were slightly higher. But now I wouldn't be solving a pricing problem as well, they would sell in 10s, rather than hundreds, so I can't take the risk. Sorry.
The plastic one I ordered from eBay at £14.00 seemed identical to the original, although they claim it is improved, so I didn't press ahead with the metal ones.
Ebay listing here:
https://www.ebay.co.uk/itm/405108872690
Plastic replacement seat levers are now available on eBay at around £14.00, supposedly with ‘improved design’. I’ve ordered one to evaluate and will post back
The paddles were developed for Granturismo & QP5, rather than Gransport. Someone on the forum has previously fitted them to a Gransport but it needed a minor mod to the steering column plastic I believe