Anyone tried this, Getting the data feeds and cloaking them dynamically as it is searched for...

I dont want to have to spend the next year cloaking a merchants products only to have 50% not be there anymore...

So I am looking for a lazy mans way to link cloaking...

I already have a simple cloaking system using php and mysql, its the data feeds for products that is bugging me...

I dont need the exact code just a brief explanation on how it is done, if it in fact can be done..

Thanks