do you have an alternative less costly and quicker available stainless steel 4002 series slotted stud?

Yes, we do. see here the alternative part numbers, parts are equal in form, fit and function ; guaranteed tensile strength and corrosion resistance are alike.

            until length 15, the old series have a larger spring cup size.  (from length 16, old and new series use the small size of spring cup) see here:       see here a picture of a 4002-4S installed into a cowling of an aircraft, together with 4002-HS grommet.

installed camloc 4002-4S

4002-4S loose

The same cost saving can also be done if you can switch to the new series in the fixed wing head stainless steel.  Mind again to use a retaining washer from stud length number 5 onwards in the new series, wherass in the old series, you had to us it only from number 15 onwards.

you can see also the difference clearly in the catalogs. below pictures are valid for lengths until length 15, where you see that the old series have a larger spring cup size.  (from length 16, old and new series use the small size of spring cup) old catalog: (you see a higher spring cup)

old camloc catalog page 4002-WS

new catalog: (you see a smaller spring cup)

new camloc catalog page D4002-WBP

you can replace also the special 4002-*A series towards D4002-*BP
4002-*A is also made in stainless steel, however the finish is black oxide.

https://anemo.eu/changes-4002-series

https://anemo.eu/do-you-have-technical-drawings-comparing-old-vs-new-stud-style-camloc-4002-series

here is the compatibility list