Find yourself a competent designer and mold them as you need.
'only to find it doesn't convert' < $197 is hardly an investment for a good LP, frankly looking for 'profitable lp's' shouldn't come with a budget and if it does 'cheap' shouldn't be a part of the equation.
Further, your designer will help you with the most important part = split testing and editing the elements until it's positioned perfectly. You can always scour for templates and adjust to your own needs if you have any exp. as well, but if I was in your shoes I'd hire one of the better/best designers on WF and nutthug them, pay them well, work with them to create a profitable campaign for you vs. hoping you'll hit big w/some cheapy cheapy special.