I see on the Xpart accessories list that the drivers side cup holders are still available. I trust this to be the case anyway with them still being listed. The question is what is involved in fitting them?
The blanking plate and unit simply pulls out. You then can push the new cup holder in. Note that if you want to remove the holder again you will need to release the plastic clip on the inside face otherwise it will break. Check the clip location on the side of the holder before you fit it so you understand what is required for removal.
I recently ordered a black ash drivers side cup holder from my local (ex MGR)dealer which arrived in a few days, under £30 if I recall. The blanking plate is disguarded the cup holders have different part numbers for light oak etc