I have a strong modified Shop Oscommerce 2.2RC2 .
Upgrade Oscommerce 2.2RC2 incl. all modification to the newest release (responsive).
Add a new and modern design (mayby with a template like Marcus from PerfectusInc).
Make Oscommerce/Template/Design/Addons etc. PHP 7.2 combatible
Current Shop has a few modification (see below).
Price with + without tax
Extra fields (Printer / Page in Database + Productlisting)
New Products (on Store Front Page)
Round Product Price to 5 cents
Currency (CHF = Swiss Francs))
Shipping (Table Rate)
All products, attributes, prices, shipping, payments, tax, etc. needs to stay in the new update version.
Also the URL have must stay the same (for Google Search and Adwords)
if you are interested write CL in the subject!