Alloy crack repair/welding recommendation in/around Chester

[shininghero]

My 18" rim's got a single crack on the inside and although it's not leaking air id like to get this sorted out asap. I'm based in Chester but work in Liverpool so does anyone have any recommendation, and how much should j be paying for this? The alloy has tyre innit so it will need to be taken off and put back/rebalanced too. Thanks in advance!