1) Yup
https://www.hogparts.co.uk//s-s-cycle-super-stock-stealth-air-cleaner-kit-p24761/s24761(Though i've just seen the price has gone up £60 over the last year!)
(also just noticed out of stock, but if you search on ebay for 170-0176 you'll find US based alternatives)
Then you probably want a cover too..
https://www.hogparts.co.uk//s-s-cycle-stealth-air-cleaner-cover-p25165/s25165And you need a bit of DIY to get it to fit.
http://www.talkmorgan.com/ubbthreads.php/ubb/showflat/Number/735870/Searchpage/1/Main/44580/Words/%2B170-0176/Search/true/using-the-universal-stealth-filter-for-x-wedge#Post735870
2) Have a search on the forum for 'bafflectomy'
Congrats, and good luck!