None of your friends, family members or associates don't have a CPU you could try?
Are there people who are selling used 3000 series CPU close to you that you could try? Offer him a nice meal or a movie ticket for his time.
Are there no PC repair stores / component merchants / used PC vendors where you can take your PC to and see if the board boots up with a newer CPU? If it did, then downgrading the BIOS should be pretty easy to do.
Are there any PC enthusiast groups online (tech sites, forums, even FB groups) with members that might be able to help you? I'm from Finland and if I needed this kind of help I'm sure I could find few people even in my small town of 28 000 people.
Harry, I'm sure you have already scoured all these options already. After all this time the answer is most likely no to all of them, so there is no need to answer.