Showers are easily to build yourself and add to your boat. I think I built the shower in my prostar 7-8 years ago for $165. Basically you need to T into your cold water intake line, install a fitting into one of the draing plugs on the block for your hot. Run those water lines into a Y fitting with adjustors (I used brass). Then run that single line to your 12V pump. I bought a $70-$80 RV pump at Camping World. Mount your pump somewhere, wire it up to an extra switch on dash. Run your hose from pump to the side gunnel or rear trunk and enjoy... Water temp adjustments occur in the Y. Once I got mine set to a comfortable setting I never really touched it.