Do you have PDF Task Add-in with coding c#?
I will change some line at code for my corp. For example, it going to attach qr code at pdf and like change old technical drawing template.
The quickest solution and cheapest way for you is to use the sw task add-in and modify the existing convert PDF VBA code to include paste as reference.
We do SOLIDWORKS PDM add-ins and we have written several tasks in C# including the PDF. Contact me if you want to buy the source of one (email@example.com).