I don't believe there are any currently marketed handheld radios that are certified in Europe for airborne use.
Most likely they do not have sufficient broadcast band filtering: VHF aviation band is directly adjacent to band 2 FM broadcast band and needs expensive, often hand-tuned filters, to work effectively.
Older second-hand units may not have 8.33kHz channels.
Edit: not sure what the deal is with other jurisdictions regarding use in the cockpit of h/h, just saw the OP is based in Canada.
Cheers, Howard
Last edited by Howard Long; 10th Jul 2013 at 19:10.