I'm going to give you a set, most of which are later than the Regency. If you find a word you want in some later reference, you'll need to go back and check it.
The Slang Dictionary. Hotten. 1859.
here
Grose's Classical Ditionary of the Vulgar Tongue. Pierce Egan. 1823.
Here.
A Physical View of Man and Woman in a State of Marriage. de Lignac. 1798.
Here.
Dictionary of Slang, Jargon and Cant. Barrere and Leland. 1889
Here.
The Works of Francis Rabelais.
Here.
Slang. Badcock. 1823.
Here.
A Dictionary of Slang, Jargon and Cant. Leland. 1890.
Here.
De Sade Philosophy in the Bedroom. 120 Days of Sodom.
Here.
The Lustful Turk. John Benjamin Brookes. 1828.
Here.
A Night in a Moorish Harem. Anon. 1896.
Here.
Aphrodisiacs and Anti-aphrodisiacs. John Davenport. 1869.
here.
Autobiography of a Flea. Anon. 1901.
Here.
My Secret Life. Anon. 1888.
Here.
The Kama Sutra of Vatsayayana. Richard Burton et al. 1883.
Here.
The London Bawd. Anon. 1705.
here.
Memoirs of a Young Rakehell. Guillaume Appollinaire. 1907.
Here.
The New Ladies Tickler. Anon. 1866.
Here.
The Romance of Lust Anon. 1873.
Here.
The Three Chums. Ridley. 1882.
Here.
JoB