We have some at Detroit Moped Works - $10 to $50 + Actual Shipping.
For Morini - we have old ones in pan, or straight pipe, or the weird ones from gyromat
For Minarelli we have 2 NOS straight ones as well as some used regular and used pan.
Email Sales@detroitmopedworks.com with your style preference, budget, and shipping address for a payment link if interested. Thanks!