I used this vendor for a custom cover for my Cayin Integrated. He does nice work at a reasonable price. All he needs are the dimensions of your amps and if you want the logo on the cover.
.https://www.ebay.com/itm/Dust-Cover-McIntosh-all-models/202277541719?hash=item2f18ae5757:g:McwAAOSwx...
.https://www.ebay.com/itm/Dust-Cover-McIntosh-all-models/202277541719?hash=item2f18ae5757:g:McwAAOSwx...