(sewing) A question about serger needles

[cupcake_goth]

I broke a needle on my serger yesterday afternoon. It's a Janome MyLock 204D, and the manual says to use HA-1SP needles with it. I suspect that JoAnn Fabrics does not carry these. The semi-helpful munchkin on the phone at the JoAnn's I called said they did carry serger needles, but she couldn't see anything that said HA-1SP on the package.

Can I *only* use those specific needles with my serger? Google isn't giving me definitive information.