You could try to contact Dave at Zeckhausen Racing. He doesn't have anything listed on his website, but he might be able to find something for you.
https://www.zeckhausen.com/
(I'm a happy, repeat customer)
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cages:'18 M2, '15 i8, '15 X6M and '18 K1600GT
History: '96 Z3, '95 540i, '95 540iA, '00 M5, '04 X5, '88 M6, '89 750iL, '08 Z4MCoupe, '12 ActiveE, '62 R60/2, '76 R90S, '08 R1200GSA, '10 G450X
I own no garage queens. If it's in my driveway, it's been ridden hard and put away wet. ...and now, with a light crust of Maine road salt.