I asked a question on bio stackexchange a few days from which I was hoping to be able to arrive at an answer for this question myself but I have had no such luck so now I am going to just ask outright: other than acetyl-L-carnitine are there any orally-bioavailable compounds (in particular orally-bioavailable to humans) that exists that can serve as an acetyl group donor for CoA?
My main motivation for asking this question is that I know that acetyl-L-carnitine indirectly promotes the acetylation of histones by serving as an acetyl donor for CoA by serving as a substrate for carnitine O-acetyltransferase and then this resulting acetyl-CoA then donates an acetyl group to histones by means of the enzyme histone acetyltransferase.