With some additional blasters, that's two complete repeater systems I outlined above. The connecting blocks came from eBay and the barrel receivers came from Hometech.

I wanted the barrel connectors for flush-mount installation so I didn't even use the receiver that came with the kit. You might luck out and find similar prices on eBay. I'm pretty sure neither of the auctions was Buy It Now, but they didn't have much action on them so they were easy enough to win.