At the mo in Lidl in Bridgend they have pumps , just like the kite ones but no cord, metal shaft etc .
I pulled one to bits its exactly the same as my others even down to the milling markings on the base left by the mold.

4.99 ! all you need to do is drill a hole for your pump leash

Next week they have stainless steel carabinas for 60p each

Thanks Al, I'm off to the shops...