I am having really a hard time finding serious Affiliates for our products, its in a odd niche. Where I can find them?
Why don't you hire a CPA agency to do that for you. If you have enough budget then it won't be any problem.
Go to some webmasters forum which has market places. I am sure you will plenty of affiliates who will be happy to promote your product.
Have tried you Upwork? Its a place for freelancers you can hire someone from there quite easily.