Based on customer email below, they seem to want a quick replacement for existing part they are using which they seem to face an issue.
We currently do not have an exact replacement for them. You need to let customer know this point and ask if they want us to proceed with customization where there is potential tool costs’ involved. Are they willing to bear these costs’? If yes, then consolidate the dwg requirements and put forth a proper request to YuCheng. It will be easier for him to assist in the sourcing for this part.