Personally I would try to avoid the original Bulgins if possible. I remember when working with the MoD in '79 that they were outlawed, the reason being that the casings are Bakelite which is brittle, and if it breaks you can end up with a handful of live terminals.
The quality of the connectors they contain is also rather primitive and crude by today's standards.
But space may be too limited for an IEC, and if you are insistent and determined, I may be able to find some in the loft. I still don't know if you are referring to the 'miniature' or other.
I've just recalled that there is an XLR plug and socket designed specifically for mains input into equipment, and which I put into my A77 many years ago. It is three pinned with fine pins and a red coloured plastic to differentiate it from the normal audio types.