Bambu PPS-CF has a Heat deflection temperature of 264c and a melting temperature of 284c. So if you put it in the oven at 200C(or maybe even 225c) I would think it would be fine even with a little variance in the actual temperature. 250C Oven temp might be too close as the temp will never be exact.
A lot of the this will also depend on the the design of the object. If it puts a lot of stress on the part it may show signs of heat deflection at a lower temp due to the stress. Heat deflection values are based off of stress.
EDIT: Polymaker PPS-CF is way cheaper on Amazon for $69 per 0.5kg if you only need a small amount. https://amzn.to/4kTbOAT
