Yep, they looked similar to some I'd seen recently in the flesh but I found that pic which is different.
I hadn't heard of M&M but the two piece ones do look like Snoozin's header, from here
http://www.neweraparts.com/Default.a...&ProductID=761
also looks like J's 2 piece, and the M&M 1 piece looks like J's 1 piece and also TRR...