Aqua Flo manufacture a range of wet ends and parts.
Their brand names are CMCP, CMHP, FMCP, FMHP, XP2 and XP2e.

A Simple Guide for Europe -

Circulation pumps use : CMCP or CMHP

48 frame pumps use : FMCP, FMHP and XP2

56 frame pumps use : XP2 and XP2e

If you are looking to buy a complete wet end, it comes with everything (housing, impellor and seal) to bolt onto your existing motor.