Is this it:
Serger Presser Foot, Babylock if it is, it is also 15% off the 33.95 with the code: NEWYEAR, which would make it 28.86. It is with Sewing Parts Online. I buy from them a lot. Good company!
It looks the same as the one on the babylock site.
If it isn't the one you are looking for, look further at the Sewing Parts Online site to see if they have different ones.