Hello, I studied product design as part of my degree course.
I use solid works to do product design and I can use other software, such as Autodesk fusion 360. Kindly get in touch, and advise me on what you need done, and what standards your require i.e BS 8888
Also forward me your specs, to enable me begin your project if you hire me.
I'll break the task into different frame part, for better management, such top tube, head tube, seat stays, chain stays, etc. And they could all be brought back together at assembly.
Kind Regards.
Denis