Omega supplement alternatives?

[stealthmode]

I would really like to start taking an omega supplement now that I'm in the 3rd trimester. The problem of course is that the fish-derived ones make me gag my eyes out, and most of the alternatives I have found at the natural foods stores are crazy expensive. I was going to pick up some Expecta DHA supplements, and then I found out they're made by Enfamil, and I feel kind of uneasy about that.

Any suggestions for a non-fish DHA supplement that won't empty my bank account?

(As for food sources, I'm not in a living situation where it's possible for me to cook and eat many foods that would be a natural source of DHA/omegas. Believe me, I would rather eat a crapload of salmon and be done with it!)