Universal Remote for the Linear Series

Regarding a 2015 North Trail 22RBK, which has a Linear Series RV5090 audio system, I do not have its remote control. I've tried one brand universal remote without success. Anyone being in a similar situation and found a universal remote to work? Thanks.

You may be able to order a replacement remote control.

They are not really very expensive.
http://magnadyne.com/rv/radio-remotes/

Here is the specific remote for the 5090.
http://magnadyne.com/linear-series-rc5080-remote-for-rv5070-rv5080-rv5090-wall-mount-radios/