I think wot posho said is a good idea….it could keep both sides hapi. The guests wont make up stories and you get to wear what you like.
By looking at the other posts looks like artificial sets are acceptable in most parts of the world. Depends on who you talk to really.
We’ve given gold sets to both SIL’s but on the walima day they have matched artificial sets to go with the outfit.
Try Birmingham and Southall…your bound to find something you like
Screw wot ppl say! Lol. its your day. Just bare in mind ur in laws feelings….if you HAD to wear a gold set then its not the end of the world… least you do well in the eyes of your the new family ;)