I have a brand new Evans Timp Skin (ET25) which will fit the following 23" timpani. If you or your band would like it please get in touch! They retail for around £90 and I am looking for £40+postage.
Adams Symphonic, Professional and Universal
Majestic Symphonic Grand, Symphonic and Harmonic
Yamaha 3000, 4100, 4200, 6100, 6200