I own a mid-1920's Vega Tubaphone Professional tenor banjo. The 19 fret neck has bowed due to many decades of string tension, such that the banjo is now a challenge to play. I am interested to repair the curvature, or to replace the neck. I am aware that many bluegrass players wish to retrofit their 4-string necks with 5-string necks, so I am hopeful of finding an original, unwanted Vega Professional tenor neck to replace mine. Any assistance on repairing or replacing my bowed tenor neck with a comparable used or new tenor neck would be appreciated.