美国采购需求：履带式底盘、橡胶履带式底盘、钢履带式底盘、钻机底盘、移动式破碎机底盘、MST1500 上滚轮

I'm looking for a quote for one hydraulic crawler undercarriage suitable for a 6-ton mulcher. I'm open to either rubber or metal tracks, with a preference for the more cost-effective option. Please include all shipping costs, taxes, and tariffs in your quote. The delivery will be to a port in New York, Connecticut, or New Jersey, where I can arrange for pick-up. If possible, I would prefer the undercarriage to have steel tracks, especially for use on rocky or forestry terrain. Additionally, I'd like to inquire about hydraulic drives from brands like Eaton, Danfoss, Rexroth, or PMP. It would also be great if it includes grease-tensioned track adjusters and sealed, lubricated rollers. Looking forward to your detailed response!