hey guys, got another obscure problem!  the temperature knob on our shower has seized solid.  i suspect it's caused by cheapness!  went into the local merchants, and they didn't recognise the shower, so couldn't tell me if a replacement cartridge is available for it or not.  have any of you seen this model of shower before and can shed any light?

top to bottom the controls are handset on/off, temperature, main fixed showerhead on/off

pipe connections are top - handset, bottom main showerhead, left hot, right cold




if replacement gubins aren't available, i'll happily replace the whole thing if i can find one that just swaps directly with the same pipe layout.  

thanks in advance