Anyone know of a simple parallel / reversal guitar effect loop switching system ?

I'm looking for something simpler and affordable than the Boss ES 5 / ES 8, as I only need to switch 2 effect loops.
 
I have two Zoom multi effect pedals, the B3 (for bass) and G3 (for guitar). I would like to setup a pedal system that is flexible to do the following :
 
B3 -> G3
G3 -> B3
B3 and G3 in parallel
 
The Boss ES 5 and 8 handle the above very well, but I'm not going to need all the additional sends / returns.
 
Sorry if this is out of regular Sonar topic.. but I do plan to use this setup for experimenting further with Sonar Matrix view.
 
Edit : A good read regarding the Boss ES 8 capabilities
https://www.boss.info/us/promos/es-8_deep_dive/
 
Thanks.

Update
 
The maker of Flip Flop switch replied my email - they won't do the parallel customization.
 
Found another switch custom shop - Saturnworks Active Parallel Looper Guitar Pedal - they have up to 4 parallel send / return, but none of 'flip flop' type, and the cost may be closer to Boss ES 5.
 
I guess, it's best to safe up for ES 5 / 8 after all.