I came across these, I think they should fit. Need to confirm model number on my lights first.
https://www.ebay.com/itm/CUSTOM-SPOT-LIGHT-COVERS-FOR-IPF-930-SUPER-RALLY-LIGHT-19-COLOURS-MADE-TO-ORDER/303533724580?hash=item46ac0513a4:g:cbQAAOSwmWFejDaP
Edit: I just realized you have the Type M...
I have the same ( or very similar) IPF Super Rally lights, and I think they're fantastic. They are actually a competition spec light, and with the IPF upgraded wiring loom are rated for 170W halogen bulbs. I have 55W/100W bulbs in mine, and they make a huge difference at night by lighting up the...