Stay as far away from WHMCS-Bridge as possible, seriously.
There's really no one size fits all solution, and the ones that try to be so fail miserably at it.
Talk to a developer, have them work something up for you. Yes, it'll cost you more in the long run, but it'll be better than dealing with either company developing the garbage that's out there for 'commercial' products. That's pretty much the equivalent of tearing your hair out. One is as slow as it gets when it comes to getting back with you, the other is as slow as it gets when it comes to actually fixing their issues