It looks soo good to me. But, unfortunately our team is very busy at this moment. You might need to hire someone to bring it's backend features at frontend to integrate with Dokan. Else, why not send a buzz the original creator to make it compatible with Dokan?
yes, you need to create a bridge between Dokan and auction plugin to bring it's beautiful features at front-end. As, i mentioned earlier our team is very busy at this moment, so you have to wait for the add-on.
Else, you may knock that plugin's developer if he can help you here.