you're not looking in the right place
http://www.blasterforum.com/threads/leakdown-testers.55015/
I have 2 versions of leakdown testers available, all come with the exhaust block off plug and available for stock 26mm - 28mm carbs,
or 34-36mm carbs.
1. the original with tire valve and exhaust plug, you supply a bicycle hand pump to pressurize to 7 psi. max. for $35 shipped.
(both 26 and 34mm sizes shown)
or
2. the new version with a blood pressure bulb for pressurizing and exhaust plug for $40 shipped
but......just sold the last 2 on wednesday last week, ordered more parts thursday and exhaust plugs have already arrived, gauges and pressure bulbs should be here by midweek at the latest