If you are wanting to remove them entirely, I have some IMRC plates with the butterflies removed and holes filled with epoxy. Bought from a guy here on SVTP and never installed them.
MMR also makes IMRC delete plates made out of billet aluminum. my order has been placed with Lethal Performance for them for 2 weeks. they have to be shipped directly from MMR so lets see how long it takes to actually get them...
***update: literally an hour or so after i posted this i got the shipping info, delayed, and they arrived yesterday. so it took about 2 weeks from the order to the day they arrived.***