DIY SMT Reflow 48LQFP
You could hand solder it. It's just one component, and it's actually probably one of the easier components to solder, once you get the hang of drag soldering. Also, if it's not drifting in the oven and you simply have solder bridge issues, do a pass with solder wick after the oven to clean up bridges. 

Also, soldermask may improve the situation. It's rare for soldermask to cost extra, may I ask why you've not got it?