The kit with two covers, grommets, and oil fill caps was part number P5007617, is original post is asking for.
Last year when I could not find any I noticed that Hughes engines specified the old number was discontinued but the covers were still available under part number P4532621 as one (1) individual cover with no grommets or oil fill caps. In March 2020 I ordered four of part number P4532621 from Tascaparts.com.
This part number P4532621 currently shows out of stock at Hughes Engines, but it is available to order on the Tascaparts.com website. Nothing I see says p4532621 was discontinued, and the ones I received last year were shipped from Mopar Performance in Michigan to Tasca Parts, then sent to me. So they were not on Tasca’s shelf as old stock.
Also, Mancini Racing has the grommets available. I just bought two sets of grommets a week ago. Mancini Racing part number for grommets is MRE5249642.
Edited to add Part number MRE5249642 and fix spelling error.