RM32 and AVB Question

My band carries around an RM32ai to use as a monitor mixer box and also FOH when we have our sound guy. But on shows when our sound guy can't make it, a lot of times the house guy doesn't know or isn't comfortable mixing FOH on an iPad and prefers the house mixing console. This works when the house has a splitter snake. With a splitter, we can still use the RM32 as just our monitor mixer which we control ourselves with QMix.

But some houses don't have splitter snakes. My question is, is there some sort of AVB box that I can coect to the RM32 (my RM32 has an AVB card) that has XLR outputs that we can coect to a house board that doesn't have AVB? I'm figuring a box like this would be smaller and lighter than a full splitter snake.

Also with this configuration (or some other config) is it possible to send audio from a Macbook to the RM32 via network/AVB as opposed to Firewire? Would I need any other hardware for this?

Thanks!

B.