Your other option is to put a crapload of rags under/around it and try to bleed it in situ.
You need to get the lines out of the way, then use some hose fittings (new masters often come with them) and short clear hose straight back into the reservoir.
The idea is that the lines are short enough that when you push the piston in, the air bubbles get pushed all the way though, then when the piston returns only fluid is pulled back in.
It takes more pumps than you would think to get all the air out. Having watched this happen, I understand why I couldn't get it to bleed properly using a vacuum pump on the nipples and gravity.
I managed to do it without those fittings, but it was f'in messy and very hard to get it all to seal well enough.
You could probably use old flare nuts if you have any the right size and just poke the hose inside it.
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