Short answer — yes. Options that can produce UGC-style video ads for Australian campaigns within ~72 hours fall into four practical groups:

1. Freelancer marketplaces (fast individual creators) — hire a UGC creator/editor with 24–72 hour express delivery (great when you have product assets or a script). Examples: Fiverr and Upwork sellers regularly offer 24‑48 hour UGC ad gigs. (fiverr.com)

2. Self-serve editors / template tools (you make the ad in minutes–hours) — if you or an internal editor can assemble assets, platforms like Canva, Clipchamp, Kapwing or VEED let you build mobile-first UGC-style ads in a few hours and export immediately. Good when you need total speed and control. (canva.com)

3. Fast-turnaround production providers / agencies (done-for-you, guaranteed SLA) — a small production vendor that explicitly promises 24–72 hour delivery for finished UGC ads (example: Ad‑Merchant lists under‑72hr and express <24hr delivery options). Use these when you want a single vendor to handle scripting, editing and delivery. (ad-merchant.com)

4. UGC collection / submission platforms (collect authentic UGC from customers quickly) — tools that let customers/creators record in-browser and submit footage immediately (so you can download and edit the same day). Example: Boost UGC. (Note: creator marketplaces that match creators quickly may still take several days to deliver finished videos). (boostugc.co)

Quick practical notes to actually meet a 72‑hour deadline

• Use stock or existing product footage when possible (shipping physical products to creators usually adds days).
• Provide a tight brief/script, ASAP, and approve an express delivery option (freelancers/agencies usually charge extra for rush).
• Accept limited revision rounds (one revision) if speed matters.
• Confirm usage/rights up front (some low-cost creators sell limited rights unless you pay extra).

If you want, I can shortlist 3–5 specific Australian-based creators/agencies or template workflows (with price ranges) that meet 72‑hour delivery and match your budget and ad format.