Optiplex 5070 PSU upgrades

Need to upgrade an optiplex 5070 SFF to at least 300w. I've seen recommendations for XE2 SFF PSU, XE3 SFF PSU, and various other PSUs such as: https://www.amazon.com/SilverStone-Technology-Computer-Connector-SST-TX300-USA/dp/B07PR7NVWX. I ended up buying the silverstone but found that heavy modification of the case would be required to make it work and I would still need an adapter for the Dell mobo's 6 pin connection. Any recommendations? Thanks