Hi, thanks for the question. The framework system is from a company called 3si, they specialise in stainless steel products, so not sure if they would do an alternative colour? This is where we buy from https://www.s3i.co.uk/greenwalltrellis.php
I think you would need to get a powder-coated grey, narrow gauge steel trellis on a frame as the paint would come off the steel rope in the 3Si system as it bends.
I hope this translates OK and I hope you find something suitable!
Thanks a lot for your immediate reply :-)