This will require ordering eDocEngine VCL, 1-developer subscription for 350USD. This component is capable of rendering ReportBuilder/RaveReports/FastReport/QuickReport/TRichView (and more) to PDF file. If RTF file was made with unsupported (by eDocEngine) report builder, then we can use ScaleRichView (499 USD). Text and all elements in PDF are searchable (not a static image!).
I can make a demo, using eDocEngine + ScaleRichView.