I took a gamble and it paid off. The spare part was a simple screw in item to replace the nitro canister thingy for the coffee. I rinsed and used it straight away for my home brew. Simple and effective. Thanks.
The quality of the products is first rate, but what really sets ikegger aside is the level of support provided. I've sent about 20 emails to the team and they've taken their kit apart to measure bits and have really gone to town to help me get a system that works. You guys will be my default for keg stuff in future. Thanks again