• at a pinch, if necessary, if need be, in a pinch, in case of necessity, in case of need, pro re nata
• any port in a storm, necessity knows no law
• you can always fall back on me
• to be in sore need of sg
• there is no need for sg
• should the necessity arise
• dire necessity compels me to
• if there is occasion, should the occasion arise
• it is cheap but not everybody's money
• necessary, needful, requisite, to need, to require
• needlessly, redundantly