I've just ordered a Neutron! Phew! One decision down, 999 to go :-)
Yes, 961 typo (now fixed). Apparently they are now available: https://www.thomann.de/gb/behringer_961_interface.htm
I really wanted an MS-20 back in the day, hence interest, but will likely give it a miss. Patching all this stuff together it going to be tough enough as it is :-)