Joshua I had feel your pain, when I got my bench type Fluke DMM, and needed to find Right Angle IEC ( picture)
Believe it or not, its very hard to find them and they cost allot, like triple or quad price than the normal ones.
And I found my in England , and got all the stock from the seller = four items. ( I was need three)
Well there is a branded manufacturer about them who called as Bulgin
If you are lucky, probably you will find the part code that you need.
My plug called: IEC Socket Inlet Right Angle Bulgin PX0587/SE