Bath tap with 12 spline cartridge. want to change tap head

[Stringman_uk]

Hi all.
My ongoing bathroom nightmare continues
Bought a set of taps for the bath.

Sagittarius Churchman Deluxe Wall Mounted Bath Filler

Shop the Sagittarius Churchman Deluxe Wall Mounted Bath Filler at Tap Warehouse with free delivery over £299* and 0% finance available**

www.tapwarehouse.com

as they were the only ones available that day.
Thought I could swap out the levers from my old taps! How naive am I?
Not really a problem to go from 1/4turn lever to full crosshead, but the crossheads are quite angular and dont match the shower temp head.
I have been looking at trying to find a replacement set but it seems a nightmare as they are 12 spline.
Ideally I am looking for some tap heads similar to :

Sagittarius Kensington Deluxe Wall Mounted Bath Filler Tap (Chrome).

Sagittarius Kensington Deluxe wall mounted bath filler tap in a chrome finish with crosshead handles. Traditional design (2 Hole). Crosshead handles. Ceramic disk cartridges. Suitable for combination boilers, gravity fed systems, mains water systems. Wall mounted. High quality brass...

www.taps4less.com

Failing that could I just replace the whole cartridge and head unit?
I presume its not just as easy of buying one, it has to be the exact same size/fit etc

Many thanks in advance

 

[Stuart981]

Best way is to use a vernier calliper to measure the dimensions of the old cartridge and compare that to the detailed dimensional sketches on cartridge manufacturers/sellers websites although getting a combination of the right number of splines and correct dimensions may not be possible.

 

[Stringman_uk]

It a fit of pique, and realising that the rush wasnt so urgent I just swallowed the cost and bought the correct taps.
Must stop try so save money, it always costs more in the long run