A realistic list of purine free foods?

I have recently been diagnosed with gout. The lists online are some what confusing, the only one food all agree on is that cherries are good for you, helping to prevent gout or help relieve an attack.

Almost all sites say no whole grains, but don't specify which grains. Apparently rice is not bad? Corn? Barley? Asparagus is a big no-no as is cauliflower. Since I am allergic to apples, my fruit (aka fiber) intake is becoming quite condensed.

After 4 weeks of no beef, dried beans, the above mentioned veggies and a ton of cherries, I can walk almost pain free.

The only bad side affect has been I have developed some thing odd in my brain that causes me to pass out. There are "barrier receptors" in the brain that tell your heart to pump more oxygen when needed and mine are malfunctioning due to be semi-sedentary for so long before the gout was diagnosed (app 3 months). I fall down, a lot.

Anyone have any lists of approved foods or info about this barrier brain receptor thing?

Thanks