I was looking for the exact same thing with Dash a while back. There aren't many options, but I found one that handles Bitcoin, Dash, and Litecoin all through the same interface. The process is identical for each coin, which made it easy once I understood the settings. I found a detailed review of this
bitmix tumbler that walked through everything step by step – choosing the crypto, setting up multiple receiving addresses, adjusting distribution percentages, delays, and the unique "randomize" feature that splits outputs into multiple transactions. The guide also covers the fee structure and the Letter of Guarantee. Saved me from guessing and made my first mix go smoothly.