Guild Wars 2

I was wondering if there is any way to get t3 racial weapons (or different weapon with same skin) rather than buy them for karma?

I wanted to get myself a seraph rifle, however 63k karma is bit to steep.
I like color scheme more than on golden rifle though.

If anyone knows a way to get those weapons other than through weapon vendor, than I would be very grateful if you could share it with me.

short answer no.
The skins are unique to that specifick vendor (except tier 1 and 2 silvari, asura weapons wich share the same skin). If you do the daily it isn’t too bad nor hard though, the jug of karma gives a nice amount of karma.