I think I got I.Oistrakh on LP as the first version of the work, later Bean and Chung - that, and maybe Accardo/Hickox, is all I have, now with Igor on CD. Oistrakh's was probably bought in one of many raids in Hungarian, Czech or GDR LP shops in the old Eastern Block days. Often, when starting to collect classical music, the buyings can be a bit random, just to get and explore the repertoire. The Virgin label/Sitkovetsky has been quite well distributed say in the UK though, it's not really obscure I think.
I agree that it's one of the best violin concertos ever, and it would be in my Top-10 (btw, as opposed to Beethoven's, but that's another story ...).