First, look at the topic Working with the Finder Selection which describes how you can work with the Finder’s selection.
You can use the Get File Attribute action to break the path into parts (like the parent path, the base filename and the extension).
You can test for the existence of a number in the base filename using the If Then Else action and the Variable “matches” regular expression condition.
You can use the Search Variable action to break the base filename apart into before and after the numbers. Search for (.?)(\d+)(.).
To increment the number while keeping the same number of digits, you can use the perl trick described at Incremental letters & numbers w/ reset, or if you only ever need exactly two digits, you can use the Set Variable to Calculation action with a format of “00”.
And then finally the Copy a File action to copy the file to the new location.