I found out you can convert your existing handheld shower head and/or shower shot hose system to a hideaway system using common parts sold at Lowe's home improvement stores. The parts to do both are less than $20 total, and to do just the shower shot portion would be even less expensive.
Tools needed:
Teflon plumbers tape and scissors or knife to cut it with
Adjustable pliers to hold garden hose connectors
Crescent (adjustable) wrench or set of open-end wrenches
Parts needed:
(posting in the forum is cropping off the right side of these photos; to see the full frame, right click the first, third and fourth images and choose "Open image in new tab" or look in my gallery album of the same topic until I can figure out how to fix it)
Bottom row, from left to right:
1/2 inch male to 3/4 inch female adapter; garden hose male quick connect, garden hose female quick connect, male 3/4 inch to female 1/2 inch adpater. Total cost of these four pieces at Lowes: $12.40 plus sales tax. This is all you need to convert your existing shower shot system to a hideaway setup.
Top row from left:
1/2 inch male to 3/4 inch female adapter; garden hose male quick connect. Total cost of these two pieces at Lowes: $6.29 plus sales tax. You only need these if you want to swap out a standard handheld showerhead with a shower shot nozzle.
The first steps are to attach the male 3/4 inch to 1/2 inch female adapter to your existing shower diverter valve. Then attach the garden hose female quick connect to the adapter, above.
Then you attach the 1/2 inch male to 3/4 inch female adapter and the garden hose male connector to the hose of your shower shot, above, and the same parts to your hand showerhead, below.
Pull back the spring-loaded middle black ring on the female garden hose connector, push in the male end of the connector and release the spring and you have the finished setup. Whenever you don't want the shower shot visible, simply pull back the spring loaded ring and the hose pops out so you can put it away from prying eyes or switch to using the regular handheld shower head of your choice.