Bintel is as good as any - there's no TV sales going on at the moment.
The 31mm Nagler might not get enough use in your scope to justify its cost though - a 17mm or 13mm (nagler or ethos) would get a lot more use as a primary observing eyepiece.
The 31mm Nagler does work well in a 1.6x Antares barlow if you don't mind that setup.
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