The phrase "a reasonable replacement" is correct and usable in written English.
You can use it when discussing alternatives or substitutes that are deemed acceptable or satisfactory in a given context.
Example: "If the original part is unavailable, we can consider a reasonable replacement that meets the necessary specifications."
Alternatives: "an acceptable substitute" or "a suitable alternative".
It is time the Senate demands a reasonable replacement.
But you can buy a vegetarian version from wholefood shops that is a reasonable replacement.
Now, terra cotta has seen a resurgence, so the original material could be a reasonable replacement, Mr. Allanbrook said; so could newer materials like concrete reinforced with glass fiber.
The model is developed for the larger-aftershock motions and it is shown that a reasonable replacement of such a model may be obtainable directly from an unconditional model.
Ayew has scored in his past two league games and showed some flashes of promise and Gana looks like he has the potential to be a reasonable replacement for Fabian Delph over time but Vertout has not kicked a ball since the 1-0 home defeat against Stoke a month ago and Amavi has lost his place to Kieran Richardson.
Howland's razor implies that you can't look at all (varphi in L^2({mathbb {R}}^nu, d^nu x)) but a special class of functions which are smooth in x and p space would be a reasonable replacement for (x=y).
In their contracts, some airlines state they will allow you to purchase reasonable replacement items or perhaps (big deal) give you an "amenity kit," but recent US DOT directives have gotten tougher on airlines in such circumstances.
Google provides a fantastic backbone, but some of the solutions they provide for basic functionality (such as making a call or sending an SMS from your Google Voice number) aren't reasonable replacements for what we've all grown accustomed to.
A tenured friend of mine -- you know, tenured as a professor, not as a friend... well, I suppose she's tenured in that way, too -- explained it to me thus: "Starting a job doesn't commit one to staying in it beyond providing a reasonable time for replacement.
Those countries can be divided further into 2 groups: countries such as Bangladesh and Kenya that have a reasonable chance of achieving replacement-level fertility in the foreseeable future, and those countries that still have a high birth rate.
Short stem hip replacement may be a reasonable alternative to classic implants and surface hip replacements.
