Upload a DXF, STEP, or even a PDF drawing when that's all the customer sent — priced against your own gauge chart, material catalog, and machine rates.
Plenty of RFQs show up as a PDF drawing with no CAD attached. Drop it into LaserQuote instead of turning it away or quoting it by hand — it prices the same way a DXF or STEP file would, against your own material catalog and rates.