How can I find a rental car in Kalibo, Philippines?
Google didn't turn up anything useful.
Is it even a good idea to try to find one, or should I just take cabs and buses to explore Panay?
Personally I'd try and do what the locals do, and use their transport - it'll be more fun and you'll meet people that you wouldn't get to if you were driving your own car. Plus you won't get lost, and you'll be able to look around and enjoy what you're seeing.
According to perennial favourite Wikitravel, vans (or L3s as they are called there) cost about 80 pesos per person from Caticlan to Kalibo and they take approximately 45 minutes to 1 hour. Look for an air conditioned van (which might come at a slightly inflated price of 10 to 20 pesos more per person). That gives you a rough price guide at least to bargain for - I suspect you may have to come prepared to negotiate ;)
There's also Jeepneys - a Jeepney to Kalibo from Caticlan takes about 1 to 1.5 hours and will cost you about 45 Pesos. Find them at Jeepney-Php 45, FX Taxi- Php 90,Terminal Roxas Ave. Street Kalibo, or use the Aklan Shuttle Bus-Php 100 up,Terminal Airport
And what sounds the most fun to me: Motorized tricycles will take you just about anywhere in Kalibo for a standard rate of 6.50 Pesos (6 Pesos 50 Centavos). Foreigners are commonly asked for much higher rates but the drivers must accept the 6.50 peso rate by law.
Here is a local place that advertises on facebook. I've never used them and therefore can not vouch for them but you can check it out. It says they are located in the area you are interested in.