Dynamic product image

Hi. Selling a product as a service and am using a plugin to add custom fields to product for customer to specify (i.e. dimensions) which calculates the price. Everything is working as planned. One of the custom fields is an image upload where the customer would provide a picture of the item they want to be serviced. This works as making the file an attachment to the order but I would prefer the image be displayed/rendered for the line item on the Cart and Order Receipt. Ideally it would replace the products image but worst case it would be an additional image shown. The other custom fields are being displayed (Height, Width, Depth) but they are just text and the image filename and URL are being displayed so just want to render as image tag I guess.

Any ideas on best way to do this? Have minimum php skills.

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