There's a guitar strap seller from Oz on eBay.
All his straps are "unique " with up to 20 available.
I mailed him this comment - he missed the irony in it.
Personally I'd take the partial refund and spend it on some sand paper, etc .
A few hours and you have a relic'ed bass.
I have one of those rubber stringed basses...tuners are rubbish and the strings won't stay in tune. Fun to play though.
Someone else had a similar query recently - not sure of the outcome though.
A friend who has been playing over 40 years had one and was very impressed.
Not surprising really - there aren't many bad new basses out there.