Spider undertray

been searching and had quotes north of £500 for an undertray for the Spider.

a rear section broke off whilst driving and before we could stop it broke in a few more places. looking online seems not easy to repair these or long lasting?

thinking about cutting some thin metal to put around the broken section with rivets

has anyone repaired an undertray or suggestion (other than Alfa) were to get on - tried a few breaker but no 2010 spiders
Usually can get after market aluminium ones in a few different places, is it the same as the 159 undertray? I think I still have the one off my old 159 SW in my garage.