Ended up getting the Hella MAF for 92 off eBay. Much better than the 170+ for genuine so thanks for the couple of people that have recommended those.
Wow, what a difference. I thought it was only affecting the revs on braking on cold start but it’s now much smoother in traffic and has noticeably more power at top end, making a beautiful noise between 5k and 6k and generally feels smoother! Wish I had done it sooner! It didn’t drive badly before but it’s even better now.