Supplier approval and monitoring of service providers

Hi, I wonder if anyone can help with this, we're going for BRC for Storage and distribution for the first time. We are a medium sized wholesaler of healthy foods and lifestyle products. We have a variety of suppliers, varying from huge multinationals to artisan candle makers in the lake district with 1 employee. I don't really want to get some of our smaller suppliers filling in really long winded SAQ type forms. Is there a simple document that I can just send to all our suppliers to answer 3.5.1.1 'Specifications or contracts shall exist between the company and the supplier to define the service provided'? Also how do we satisfy 3.5.1.2 'The performance of the supplier shall be monitored and action taken where services fail to meet requirements'. Obviously we do that in practice all the time. If they are a rubbish supplier in one way or another then they get delisted. I'm struggling to know how to demonstrate something to the auditor that doesn't result in a load of unnecessary bureaucracy. Many thanks for any help!