how to Integrate SAP with Solid works?

Hello Experts,

My customer is asking to do some research on integrating SAP with Solid works. I don't have any Prior experience on this. Can any one give me some inputs on below questions

1) How to Design the interface between SAP and Solid works?.

2) Is it better to Design our own Interface or better to Buy some third party tools?.

3) Please give me some best Third Party tools for this purpose?.

Thanks a lot in advance...

Regards,

Mohan.