Hi guys,  I’m really struggling to find parts like front wheel arch brackets and arches. Typically last Friday the near side broke off and I had to leave it in the garage all weekend hart broken. 

any pointers in the right direction would be great. 

Try Kit spares

https://www.kitspares.co.uk/index.php?route=product/product&path=43_40&product_id=1167&car=43

The kit spares 2b ones do work on a sierra based s7, but you will more than likely want the et35 version, not the et15 version linked.  To confirm you will need to check the offset of your wheels.

Its a triumph dolomite with coil overs Iv got the new wings on there way but the bracket I’m really struggling with 

You won’t find anyone selling an off the shelf bracket for a dolomite based car. 

i made the mistake of buying the trinph robin hood and its still in my garage never made as the company ripped me off as they made the body wrong so i do have a car wings engine i need to get rid off