Yep, that's exactly what I thought you were asking.
Sorry, I already mentioned the only thing I knew of for sure that might do what you wanted and get a decent signal because they are generally pretty small and flexible.
TrailBeast, I still haven't closed on an antenna, but found this on the net. For me it explained a lot. "Both terrestrial radio and satellite radio use omnidirectional antennas, which can be contrasted with the directional antennas used by satellite television services. However, your existing car antenna that’s designed to receive AM and FM signals isn’t capable of receiving satellite radio transmissions.
The issue is that the FM broadcast band occupies part of the very high frequency (VHF) radio spectrum, the AM band utilizes part of the medium frequency (MF) band, and satellite radio occupies the S band.
Although there are slight variations between different countries and regions, the North American bands are:
