| The strings on your 4003 are nickel roundwounds with a guage of 45,55,75,105. It's almost impossible to find a packaged set with those identical guages. You'll have to make up the set out of singles, or go with a set that's close.
On my 4001, I like the Rotosound SM-66, they're 40,60,80,100. or you might like the RS-66LC set, 40,60,75,95.
They're also available in Nickel if you don't like stainless.
They're made in the UK, so maybe they're less expensive
for you.
Good Luck
Slug | 
Looking for good match to Ric strings as supplied with new 4003. 
