yes, that could serve the purpose, but it is a concentric pot with 2 shafts requiring 2 knobs. it also is an audio/log pot. probably one of the only options besides finding a 250k/250k dual like wolf. some have, including myself, have just made our own 250k/500k's by disassembling a 250k/250k and a 500k/500k linears and reassembling the bottom wafers on the other pot.
Disclaimer: I make and sell Buffers. I also sometimes Modify, Build and sell preamps and amplifiers. My opinions are not intended to be sales pitches. I am a one man shop and prefer to spend time with my wife and family, i work full time on call and love to spend my spare time doing other things. I only make, modify or build things for those that seek them.