I bought a Mountney 15" wheel and boss kit, boss kit was fine, but wheel was the biggest pile of **** I've ever bought, It kept folding up the spokes were made of toffee. Mountney replaced it twice, but it kept failing.
Managed to buy a 10 year old, old stock one from an MG spares shop, it's a 14" one, so not as ideal as the 15" one, but it's been fine.