美国采购需求：黑白超声波、彩色多普勒超声波、心电图、数字X光、病人监护仪

I'm looking for a rectal probe compatible with my veterinary ultrasound machine. Currently, I have the convex probe, which works well for my needs, but I'd like to expand my capabilities with the addition of a rectal probe. Could you provide details on the available options, including specifications, pricing, and lead times? Also, let me know if there are any volume discounts or special offers. Looking forward to your prompt reply!