RuggedCircuits:
The RXJ010M2ABK-0511P is definitely overkill for this application (100V??) but its impedance is fine -- 0.16 ohms at room temperature (I'm not sure where you got the 7 ohms number from).
Ok, can you help me find where you got 0.16? For my number, I looked at the tables on pages 2-3 until I found the section for this unit (100V (2A)), then looked at the row for 1uF, and followed over to the column for "Impedance / 20C". Voila, 7!
Mouser has a category for "Low Electrolytic Capacitors", and this is the ONLY stocked product in that category at 1uF.