One of the options is one of the CO2 Bicycle Tire Inflators such as sold at Wal-Mart or any bicycle specialty shop. The Wal-Mart one will probably not be in stock but can be delivered. Most of the muzzleloading CO2 unloaders are the bicycle inflators packaged with muzzleloading markings. The needle valve can be modified for a touch hole, or a rubber tip can be used. Do a search on the forum for modifications of a tire valve to use the Schraeder fitting to replace a 1/4-28 nipple. The rubber tip can be used if the nipple is metric.
https://www.walmart.com/search?q=co2 bicycle tire inflator&typeahead=bicycle tire inflator
An air compressor capable of generating 150 PSI of pressure can also be used in most cases to remove a stuck ball or jag. Do put some solution such as dish soap and water on top of the stuck object to loosen fouling there. Let set for a few minutes, dump out the lubricant and apply pressure.
https://www.walmart.com/search?q=co2 bicycle tire inflator&typeahead=bicycle tire inflator
An air compressor capable of generating 150 PSI of pressure can also be used in most cases to remove a stuck ball or jag. Do put some solution such as dish soap and water on top of the stuck object to loosen fouling there. Let set for a few minutes, dump out the lubricant and apply pressure.