I seem to remember that one manufacturer - PS Audio, maybe? - has power cords that feature a removable ground pin (on the plug that connects to the wall socket). That way, you can use the cord with your 2-pin setup.
Yes, the two prong power cords are known as a C7 connection. Most of those supplied with audio components are chintzy and of poor quality. I have purchased two C7 power cords, one Audioquest NRG-1.5 (6ft) and one PSAudio. One was for my Marantz Blu-ray DVD player and the other for a Marantz multi-channel SACD player. Both are great and I can not tell the difference that much. The PSAudio is their entry level power cord.
Is the connection a standard IEC type plug? Or is it the flat "figure 8" type. Ps Audio Does have a removable ground pin. Also Cardas makes a two prong with the "figure 8". Another option is to buy a length of bulk Audio Quest power cord and terminate your own. You might also check with the folks at usedcable.com and see if they have any trade-ins that you could buy for less. And I would think just about any power cord company would make up a special one for you. Cardas made one for me a few years back with 90 degree plug. There are quite a few options in high end power cords, also check with Audio Advisor.
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