What you want is a BQ4013YMA-120, made by either TI or Benchmarq. Basically, any part beginning BQ4013 will do.
The Eventide part number is 202106, so call 201-641-1200 and see if they have any. (Probably not).
Otherwise, try http://www.digikey.com, who show stock of BQ4013MA-120, but have minimum order quantities. Maybe you can talk them into selling you just one.