Jo gave you very good guidance. Take an existing contempt form that would typically be used for something else and change it to fit your circumstances.
Per order dated xx/xx/xxxx former husband was to......
Spell it out specifically. Be factual. And make sure you include the language "Wherfore, former wife is requesting..." and list what you want:
1) Former husband to be found in contempt
2) Former husband to pay all costs for xx property
3) Former husband to pay all owed costs to bring account to date.... whatever it is you want.
If you want him to have to face sanctions if he does this again, include that...if you want him to have to pay for attorneys fees if he does this again, do that.
Then you will have to find out if you need to set a date for hearing and send him copies of the hearing date.
When you present your case, be factual, show (by cancelled checks) you have had to pay the account, show any payments he has made, how many are missing, etc... anything to substantiate your claim...