Hello!
Please disclose all relevant information for proper assessment of the job.
A) source site url
B) what are the target bits of data?
C) how exactly did you come to the conclusion that it's a "small alteration to get it working again" that's only going to be required?
D) any other, even remotely, relevant information...
Without all of these any offer would be a simple lie.
Kind Regards,
Dobri