can any ska horns players help me?

hey, I'm not expecting a lot of replies for this thread, but suprisingly a lot of bass players play a brass instrument as well. Here's my pickle. I play in a ska/punk band and we've been recording lately. only about half of our songs are ska so we felt it'd be best to not look for a horns section. however the ska songs we have recorded feel like they are missing that feel that could be filled by a horns section. so heres my question: my knowledge of trumpet and trombone is limitted and we do have a decent synthesizer that we could use to put horn tracks in.(if that doesn't work we could also get someone to play the lines we've wrote). But could someone give me some guidelines (or a place to look) as to create decent catchy lines.