I did a quick Google search and found a part number similar to that one on Newark - it was around $360 and lead time was 74 days
I ran across this: http://www.altronix.com/p_pdf/RBR1224.pdf
searching Google for "toggle relay"
which seems like it fits the bill, if I'm reading the datasheet correctly. It would be worth sending the manufacturer an E-mail to see if it'll work.
Those seem to be selling for in the range of $20-$30 online.